Why do so many mountain ranges exist next to a desert? As part of a larger series, PBS 6-8 Weather and Climate answers this question. The presentation offers diagrams and photographs of the development of a rain shadow. From Oregon to...

Walking through the ancient Nabataean city of Petra can be a challenge. A tour begins with a 20-minute walk down a rocky slope through the narrow Siq to get to the famous Treasury known to Indiana Jones fans. But that is...